Pedicle screw placement accuarcy using a new intraoperative cone-beam computed tomography imaging technique: retrospective analysis of 586 pedicle scerws.

Pedicle screws are used for the treatment of various pathologies. Ideally placed screw is fully contained within the pedicle with no breach. The gold standard to assess screw placement is postoperative CT scan. New intraoperative imaging techniques have been adapted to enable direct pedicle breach determination. Artis zeego (Artis zeego, Siemens Healthcare, Forchheim, Germany) is a new intraoperative CBCT imaging technique used in our institution. We aim to firstly assess the accuracy of pedicle screw placement using it and then assess the efficacy of this new CBCT technique for intraoperative assessment of pedicle screw insertion and pedicle breach determination, and to compare it with conventional postoperative CT scan.